French yacht designer Mathis Ruhl has revealed his latest superyacht concept – unique trimaran with a heavy focus on capturing and transforming wind energy into an efficient propulsive force by means of a new rigging development. New Wind Motion 70 is the successor of the R77 concept, equipped with a rotating twin mast. But, this new concept is a further development and is called Rotating Twin Mast² (RTW²).
For this projet rig criteria are following:
– Main propulsion in media wind conditions
– Full automation and safe maneuvers, emergency release ability
– Aerodynamic efficiency for all courses (up-wind to down-wind)
– Adaptation and efficiency in strong wind
– Low windage for motoring, mooring or gale withstanding
Ruhl explains: “We previously developed the MRTW rig as a wind propulsor suited for larger vessels. With the RTW ² rig, we took the concept even further, breeding it with the articulated two elements thick wing concept. A larger wing mast section and foldable articulated thick sail reduces the compression load in the mast, and unties the two spars in a central pivot. The result is higher aerodynamic efficiency, a lighter structure, and lower required deck space.”